1111231312212 has 24 divisors (see below), whose sum is σ = 2963283499456. Its totient is φ = 317494660608.

The previous prime is 1111231312201. The next prime is 1111231312271. The reversal of 1111231312212 is 2122131321111.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6614472013 + ... + 6614472180.

Almost surely, 2^{1111231312212} is an apocalyptic number.

1111231312212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111231312212 is an abundant number, since it is smaller than the sum of its proper divisors (1852052187244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111231312212 is a wasteful number, since it uses less digits than its factorization.

1111231312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13228944207 (or 13228944205 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 1111231312212 its reverse (2122131321111), we get a palindrome (3233362633323).

The spelling of 1111231312212 in words is "one trillion, one hundred eleven billion, two hundred thirty-one million, three hundred twelve thousand, two hundred twelve".